Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cddab25fbeef922…

MALICIOUS

PDF

80.7 KB Created: 2021-09-22 16:05:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e2cd885b70a919001285530b9b413341 SHA-1: 97c7e7a1b9b9fb9e8b553d7a7fe93c2af7522403 SHA-256: 3cddab25fbeef922708d74cc909e299479021108c0aa50ea5b8a6c1d628ae3ae
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of a link farm on disposable hosting, as identified by heuristics, suggests an attempt to redirect users to malicious content or phishing sites. No scripts were extracted, but the overall structure and heuristic firings point to a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://stensoproject.com/userfiles/files/73209113893.pdf In PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613ebbb20c54e---76151391596.pdfIn PDF document text
    • https://toliveinchristjesus.ceosale.catholic.edu.au/application/third_party/ckfinder/userfiles/files/76492339117.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613396f73a1da---fidusokebokubarutu.pdfIn PDF document text
    • https://tessuno.com/upload/files/613a3e1204461.pdfIn PDF document text
    • http://xn--42-jlclgg6a3e.xn--p1ai/userfiles/file/lipekovafegelip.pdfIn PDF document text
    • http://gartenbaukoeln.de/uploads/files/puzazafebujanemajeponuwov.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/junok.pdfIn PDF document text
    • http://artpolyclinic.com/file/files/jomuzilugikajebiridelan.pdfIn PDF document text
    • https://doktor-ara.com/userfiles/files/xegumo.pdfIn PDF document text
    • https://onlineadda.organicemall.com/ckfinder/userfiles/files/77913416294.pdfIn PDF document text
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/11141752490.pdfIn PDF document text
    • http://www.serenissimaservizi.com/files/59419739550.pdfIn PDF document text
    • http://flywings.sk/UserFiles/file/72764621118.pdfIn PDF document text
    • http://boletin.alicantehosteleria.com/lib/ckfinder/userfiles/files/xeluwukakakosoxebuvuxab.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/161326f7d3adb2---makag.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/053691da8e80c1cb7648ec4024ed5a9b/wasesosaramoruge.pdfIn PDF document text
    • https://majubesar.info/contents/files/zikutikixefeleramavogap.pdfIn PDF document text
    • http://techcessgroups.com/userfiles/file/dogifufebevijelali.pdfIn PDF document text
    • http://bodybybodyology.com/ckfinder/userfiles/files/12292769987.pdfIn PDF document text
    • http://www.sanjuktabanerjee.com/fckimages/file/logebowelozegawejix.pdfIn PDF document text
    • http://luckdidea.com/ckfinder/images_store/files/fevudonaxewuvaniwa.pdfIn PDF document text
    • http://trongtinpc.com/luutru/files/66697597280.pdfIn PDF document text
    • http://immobilieninvestors.net/userfiles/file/jakowaramogujaberawose.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=naruto+game+android+download+apkPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B5 10824 bytes
SHA-256: c0899937039db0e6650d94b23ff31702a39f803935382240a0d36d6cea60a145
font_01_sfnt_off0000ed7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7B 18136 bytes
SHA-256: 990e344da0ec42a732e9d38c6da9ca292261093a41baa4c84740867a01fd4134
font_02_sfnt_off00011d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.